<< Worth exploring as long as I can do SRPL it may work. >>
You cannot reliably operate on RTF text this way. Instead, you must rely on two RTF controls (they can be hidden) and an API that allows you to set the select position and select length, then cut or copy the selection, then position the select position in the target RTF field, then paste the text. This API is not (currently) supported from R:Base, but I imagine you can do it with Windows messages with some research. -- Larry

